Patrick fitzgibbons



(No Model.)

P. PITZGIBBON'S.

v STEAM GENERATOR. No. 530,889.

Patented Dec. 11, 1894.

WITNESSES ATTORN EY8.

UNITED STATES PATRICK FITZGIBBONS, OF OSWEGO, NEW YORK, ASSIGNOR TO THE FITZGIBBONS BOILER COMPANY, OF SAME PLACE.

STEAM-GENERATOR.

SPECIFICATION forming part of Letters Patent No. 530,889, dated December 1 1,1 894.

' Application filed July 21, 1894. Serial No. 518,177. (No model.)

To all whom it may concern:

Be it known that I, PATRICK FITZGIBBONS, of Oswego, in the county of Oswego, in the State of New York, have invented new and useful Improvements in Steam-Generators, of which the following, taken in connection with the accompanying drawings, is a full, clear, and exact description.

My invention relates to improvements in steam generators of substantially the same type as set forth in my Patent No. 313,307, issued March 3, 1885; and has for its object a particularly effective, practical, and economically manufactured construction for insuring entire combustion of the gases and a highly economical operation of the generator; and to this end it consists, essentially, in certain peculiarities ot' the construction and arrangement of the component parts of the generator for'effecting the desired result, all as hereinafter more particularly described and pointed out in the claims.

In describing this invention, reference is had to the accompanying drawings, forming a part of this specification, in which, like let ters indicate corresponding parts in all the views.

Figure 1 is a longitudinal vertical section, partly in elevation, of my improved generator, Figs. 2 and 3 are, respectively, end and top plan views of the detached combustion chamber. Fig. 4 is a detail section, taken on line 4-4:, Fi 3; and Fig. ,5 is an elevation of a cylinder from which the upright shell of the combustion chamber is formed. 1

In my aforesaid patent I have set forth a generator provided with an uprightcombustion chamber having its lower end formed of greater cross sectional area than its upper and for permitting the use of a substantially flat upright flue sheet at the upper end of the generator. In the practical use of generators of this construction I have discovered that, owing to the limited space at the upper end of the combustion chamber, more or less of the gases and other products escape unconsumed without efiecting the desired economical operation of the generator. A generator of this construction also necessitates a considerablenumber of plates for forming its combustion chamber, joints between the plates, which are more or less liable to leak, and stays between the top wall of the upright water-containing shellof the generator and the lower portion of the top wall of the com- "bustion chamber.

' In my present invention the'upper end of the combustion chamber is formed of substantially the same cross sectional area as its lower end. I The entire combustion chamber is composed of an upright shell a cap for the shell, and anupright flue sheet, which are all easily and economically brought to the desired form, and are readily secured together by water tight joints. 7

A represents the outer water-containing shell of the generator, which is preferably formed cylindrical and stands vertical. A substantially horizontal extension A extends from an intermediate portion of one side of theshell A, and is also preferably formed cylindrical. This extension is provided at one end with an outturned flange or shoulder a secured by rivets a to the edge of an opening a in the corresponding side of the shell A. The opposite end of the extension A" is provided with a smoke-box B having a discharge pipe B. One wall a of the smokebox B consists of a flue sheet, from which project fiues C of any desired number and construction. The combustion chamber D is also preferably formed cylindrical, and is arranged within the shell A. This chamberD preferably consists of an upright shell d, a cap (1, and a circular flue sheet d aligned with the extension A and the flue sheet a and to this sheet d are secured the projecting ends of the dues O. The shell d is secured by short stays D to the adjacent walls of the shell A, and its top edge inclines downwardly from the upper corner or outer point (1 on one side thereof to points d on the opposite side thereof, which points are also at opposite edges of the flue sheet cli, as will be seen below. As clearly seen in Fig. 1, each half of said top edge (that is, from the point (1 to one of the points d is struck on a downwardlycurved line; the upper extremity being substantially straight in side elevation and inclined at an oblique angle to a vertical, the lower extremity being substantially horizontal, and the central portion between these extremities being curved. The two points 61 at opposite edges of the flue sheet are connected by a downwardly-curved rounding outout (1 which is provided with an outwardly extending flange or shoulder (1. This shell d of the chamber D may be and preferably is formed of a single piece of sheet metal, and at Fig.5 I have shown a cylinder D whose upper end is of proper shape to permit the shell d to be formed therefrom. Itwill be noticed that one side of this cylinder is provided with an upright cut or slit D producing at each side thereof what may be termed flaps, D whose position in the finished article is indicated by this numeral in Fig. 1. In the process of converting this cylinder D into the shell d, said flaps are bent outwardly (toward the reader in Fig. 5) until they stand in the curved plane indicated by the dotted line d at which time the two sides of the slit D will form the rounding cut-out d described above, the corners of the flaps will extend up to the points 01 at opposite edges of the flue sheet, and the upper edges of the flaps and the remaining portion of the cylinder will form the upper end of the shell 01 and be of the configuration above set forth.

The cap 61' preferably consists of a single piece of metal bent into rounding cross section as seen in Fig. 2, with one end cut off so as to stand in a vertical plane substantially coincident with that of the shoulder d above described, whereby it extends over the upper edge of the flue sheet between the points (1 and may be connected with said sheet as described below. The edges d of this cap are substantially horizontal for a short distance, then bend upward slightly, and then extend in oblique lines inside elevation to a meeting point at its other end-whereby such edges and last-mentioned end have no marked division between them, but approximate closely the contour of the upper end of the shell 61 and lap the same or a shoulder d projecting therefrom, to which they are suitably secured as by rivets al The flue sheet d consists of aflat plate having an inwardly bent edge d suitably secured, as by rivets d to the shoulder d of the shell cl, and the adjacent end of the cap at. Suitable stays E of uniform length are interposed between the top wall of the shell A, and the cap d of the combustion chamber.

The operation of myinvention will be readily understood upon reference to the foregoing description and the accompanying drawings, and it will be particularly noted that the combustion chamber is formed of a minimum number of parts, viz., an upright shell, a cap,

and an upright flue sheet; that the upper end of the combustion chamber is formed of substantially the same crosssectional area at its lower extremity, thus greatly accelerating combustion of the gases and other products of combustion, and that this particular construction of combustion chamber is strong and durable, and necessitates stays of but limited length to support its cap.

As the exact detail construction and arrangement of the component parts of my invention may be somewhat changed without departing from the spirit thereof, I do not herein limit myself to the exact detail construction and arrangement,neitherdo Ilimit myself to the use of myimproved combustion chamber upon the described type of boilers only.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-- 1. As a new article of manufacture, the herein described combustion chamber, the same being composed of an upright shell of rounding cross section having its top edge inclined downwardly from one side to its oppo' site side, and a curved cut-out standing in a vertical plane and extending downwardly from the'lower end of said edge, a cap of rounding cross section arranged above the upper extremity of said upright shell and having its lower edge lapped with the top edge of the upright shell and formed of substantially the same contour, the end of said cap of greatest width having its edge aligned with the downwardly extending cut-out of the upright shell, and a substantially flat vertical flue sheet secured to the latter end of the cap and to the adjacent edge of the cutout, substantially as and for the purpose described.

2. As a new article of manufacture, the herein described combustion chamber, the same being composed of an upright shell of rounding cross section having its top edge inclined downwardly on a curved line from one side to its opposite side and provided with an inwardly extending shoulder at the upper portion of the top edge and a curved cut-out standing in a vertical plane and extending downwardly from the lower end of said edge, an outwardly extending shoulder at the edge of said cut-out, a cap of rounding cross section arranged above the upper extremity of said upright shell and having its edges secured to and formed of substantially the same contour, as those of the shell the end of said cap of greatest width havingits edge aligned with the shoulder at the outer edge of the downwardly extending cut-out of the upright shell, and a substantially flat vertical flue sheet secured to the latter end of the cap and to the adjacent shoulder of the upright shell, substantially as and for the purpose de scribed.

3. As a new article of manufacture, the herein described combustion chamber, the same being composed of an upright cylindri cal shell having at one side two integral flaps standing in a curved plane atright angles to the axis of the shell with their outer edges forming a downwardly-extending curved cutout, the upper edges of said flaps being approximately horizontal, then merging into curves, and then extending on oblique lines to the opposite side and the upper corner of the shell, a cap of rounding cross section arranged above and having its edges secured to the upper end of said shell and to the upper edges of the flaps with its end of greatest width standing in the vertical plane of the ends of the flaps, and a flue sheet arranged within this plane and secured to the cap and the flaps, substantially as and for the purpose set forth.

4. In a steam generator, the combination with an upright water-containing shell, a substantially horizontal extension therefrom, flues arranged longitudinally within the extension, and a smoke box at the remote end of said extension one side of which constitutes a flue sheet for this end of the flues; of the herein described combustion chamber consisting of an upright shell arranged concentrically within the water-containing shell and having at one side two integral flaps standing in a curved plane at right angles to i the axis of the shell with their outer edges forming a downwardly-extending curved cutout, the upper edges of said flaps being approximately horizontal, then merging into curves, and then extending on oblique lines to the opposite side and the upper corner of the shell and there having an inwardly projectingfiange, a cap of rounding cross section arranged above and having its edges secured to the flange at the upper end of said shell and to the upper edges of the flaps with its end of greatest width standing'in the vertical plane of the ends of the flaps, and a flue sheet arranged within this plane opposite said horizontal extension of the water containing shell and secured to the cap and the flaps, the inner ends of the flues being secured to this sheet, substantially as and for the purpose set forth.

In testimony whereof I have hereunto signed my name, in the presence of two attesting witnesses, at Syracuse, in the county of Onondaga, in the State of New York, this 5th day of October, 1893.

' PATRICK FITZGIBBONS.

Witnesses:

CLARK H. NORTON, E. A. WEISBURG. 

